EP3767439A1 - Steuerschaltung für berührungstafel und berührungstafel - Google Patents

Steuerschaltung für berührungstafel und berührungstafel Download PDF

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Publication number
EP3767439A1
EP3767439A1 EP18915586.4A EP18915586A EP3767439A1 EP 3767439 A1 EP3767439 A1 EP 3767439A1 EP 18915586 A EP18915586 A EP 18915586A EP 3767439 A1 EP3767439 A1 EP 3767439A1
Authority
EP
European Patent Office
Prior art keywords
touch
terminal
transmission interface
interface
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP18915586.4A
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English (en)
French (fr)
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EP3767439B1 (de
EP3767439A4 (de
Inventor
Weibo QIU
Qiyuan YANG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Shiyuan Electronics Thecnology Co Ltd
Guangzhou Shirui Electronics Co Ltd
Original Assignee
Guangzhou Shiyuan Electronics Thecnology Co Ltd
Guangzhou Shirui Electronics Co Ltd
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Publication of EP3767439A1 publication Critical patent/EP3767439A1/de
Publication of EP3767439A4 publication Critical patent/EP3767439A4/de
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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
    • G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F2213/0042—Universal serial bus [USB]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2354/00—Aspects of interface with display user
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/20—Details of the management of multiple sources of image data

Definitions

  • the present application relates to the field of touch input technology, in particular to a touch panel control circuit and a touch panel.
  • touch panel with large screen and human-computer interaction has been widely used in multiplayer interactive scenarios such as class teaching and conference.
  • some touch panels are also equipped with signal source interface which allows access to multiple signal sources, such as access to an external computer equipment to display the display screen of external computer equipment on the touch panel on which a user can operate the display screen of external computer equipment, or access to a computer module with independent operating system to enable the touch panel to have double system operation interface.
  • the touch input device of the touch panel (such as infrared touch box or electromagnetic screen) needs to transmit a touch coordinate information to the main chip and signal source respectively, so that the main chip can respond to the touch coordinate information to realize main system functions such as calling out the menu of switching channel and configuring the display properties.
  • the additional signal source can also respond to the touch coordinate information to realize the operation indicated by the user's touch action.
  • the touch input device also needs to respond to the command of the main chip to differentiate the transmissions of the touch coordinate information on the two channels. For example, when calling up the menu of switching channels, the signal source should be prohibited to respond to the corresponding touch coordinate information corresponding to the menu area.
  • the general touch input device often has only one signal output interface.
  • the supplier of touch input device should cooperate to add the amount of output interface and customize the interface protocol to realize diversified processing of touch coordinate information transmission, and increase the development process of touch panel, and thus cost is high.
  • the present application provides a touch panel control circuit and a touch panel, which can use a general touch input device and simplify the development process of the touch panel and reduce the cost.
  • the present application provides a touch panel control circuit which includes a touch diversion module, a main chip and a signal source interface.
  • the touch diversion module includes an input interface, a first transmission interface and a second transmission interface; the main chip includes a touch information transmission interface.
  • the input interface of the touch diversion module is configured to connect the output interface of the touch input device and receive a first touch coordinate signal from the output interface of the touch input device.
  • the first transmission interface of the touch diversion module is connected with the touch information transmission interface of the main chip; the second transmission interface of the touch diversion module is connected with the signal source interface; the touch diversion module is configured to receive, via the first transmission interface, the signal distribution instruction from the touch information transmission interface of the main chip, and further responsive to the signal distribution instruction, transmit a second touch coordinate signal corresponding to the first touch coordinate signal through the first transmission interface and / or the second transmission interface.
  • the present application further provides a touch panel, which comprises a touch input device and a touch panel control circuit according to an embodiment of the invention.
  • the touch input device includes an output interface, which is connected with the input interface of the touch diversion module in the touch panel control circuit.
  • a touch diversion module which receives the first touch coordinate signal from the touch input device and the signal distribution instruction from the main chip is added to the touch panel control circuit.
  • the function of distributing touch coordinate signal to the external signal source and / or the main chip responsive to the signal distribution instruction is thus realized. That is, the touch diversion module not only realizes the expansion of the interface to complete the function of distributing touch coordinate signal to two channels, but also customizes an interface protocol on the touch diversion module to realize the distribution of touch coordinate signal responsive to the signal distribution instruction.
  • the present application addresses the problem of necessity for adding an output interface to the touch input device, customizing the interface protocol and increasing the development process of touch panel, so as to achieve the effect of enabling use of general touch input device, simplifying the development process of touch panel and reducing the cost.
  • Fig. 1 is the schematic view of the touch panel control circuit according to an embodiment of the present application.
  • the touch panel control circuit 10 includes a touch diversion module 11, a main chip 13 and a signal source interface 12.
  • the touch diversion module 11 includes an input interface A, a first transmission interface B1 and a second transmission interface B2.
  • the main chip 13 includes a touch information transmission interface E.
  • the input interface A of the touch diversion module 11 is configured to connect the output interface of the touch input device 20 and receive the first touch coordinate signal from the output interface of the touch input device 20.
  • the first transmission interface B1 of the touch diversion module 11 is connected with the touch information transmission interface E of the main chip 13.
  • the second transmission interface B2 of the touch diversion module 11 is connected with the signal source interface 12.
  • the touch diversion module 11 is configured to receive, via the first transmission interface B1, the signal distribution instruction from the touch information transmission interface E of the main chip 13, and further responsive to the signal distribution instruction, transmit the second touch coordinate signal corresponding to the first touch coordinate signal, through the first transmission interface B1 and / or the second transmission interface B2.
  • the signal source interface 12 is configured to connect the signal source 30.
  • the signal source interface is configured for pluggable connection of external computer module or wireless connection of external computer terminal, that is, the touch diversion module 11 transmits the second touch coordinate signal to the main chip 13 and / or these signal sources 30, so that the main chip 13 and / or the signal source 30 can respond to an touch action, executed by the user, on the touch input device 20.
  • the second touch coordinate signal corresponding to the first touch coordinate signal is transmitted through the first transmission interface B1 and / or the second transmission interface B2, which may include one or more of the following operations:
  • the touch diversion module 11 includes a first MCU (Microcontroller Unit, not shown in the figure). Responsive to the signal distribution instruction, the first MCU is to determine which one of the first transmission interface and the second transmission interface is the interface for outputting the second touch coordinate signal.
  • a first MCU Microcontroller Unit, not shown in the figure. Responsive to the signal distribution instruction, the first MCU is to determine which one of the first transmission interface and the second transmission interface is the interface for outputting the second touch coordinate signal.
  • the first MCU responsive to the signal distribution instruction, is to determine whether to output the second touch coordinate signal. In an embodiment, when determination of outputting the second touch coordinate signal is made, the first MCU is further to determine which one of the first transmission interface B1 and the second transmission interface B2 is the interface for outputting the second touch coordinate signal, responsive to the signal distribution instruction.
  • the first MCU responsive to the signal distribution instruction, is also to convert, according to the preset coordinate conversion algorithm, the first touch coordinate signal into the second touch coordinate signal, .
  • a touch diversion module which receives the first touch coordinate signal from the touch input device and the signal distribution instruction from the main chip is added to the touch panel control circuit.
  • the function of distributing touch coordinate signal to the external signal source and / or the main chip responsive to the signal distribution instruction is thus realized. That is, the touch diversion module not only realizes the expansion of the interface to complete the function of distributing touch coordinate signal to two channels, but also customizes an interface protocol on the touch diversion module to realize the distribution of touch coordinate signal responsive to the signal distribution instruction.
  • the present application addresses the problem of necessity for adding an output interface to the touch input device, customizing the interface protocol and increasing the development process of touch panel, so as to achieve the effect of enabling use of general touch input device, simplifying the development process of touch panel and reducing the cost.
  • Fig. 2 is a schematic view of the touch panel control circuit according to another embodiment.
  • the touch panel control circuit includes a touch diversion module 11, a main chip 13 and a signal source interface 12.
  • the touch diversion module 11 includes an input interface, a first transmission interface B1 and a second transmission interface B2.
  • the main chip 13 includes a touch information transmission interface E.
  • the input interface of the touch diversion module 11 is configured to connect the output interface of the touch input device 20, to receive the first touch coordinate signal from the output interface of the touch input device 20.
  • the first transmission interface B1 of the touch diversion module 11 is connected with the touch information transmission interface E of the main chip 13.
  • the second transmission interface B2 of the touch diversion module 11 is connected with the signal source interface 12.
  • the touch diversion module 11 is configured to receive, via the first transmission interface B1, the signal distribution instruction from the touch information transmission interface E of the main chip 13, and further responsive to the signal distribution instruction, transmit the second touch coordinate signal corresponding to the first touch coordinate signal through the first transmission interface B1 and / or the second transmission interface B2.
  • the touch panel control circuit includes a plurality of signal source interfaces 12.
  • the plurality of signal source interfaces 12 may include an interface configured for acquiring touch coordinate signals (Personal Computer, PC module interface 121 or Android module interface 122) of computer modules independent of the main chip 13 in the touch panel, an wireless transceiver module 123 configured for wirelessly connecting the wireless projector to obtain a video signal of the external computer connected to the wireless projector and transmitting the touch coordinate signal to the external computer, and an additional signal source interface 124.
  • the above plurality of signal source interfaces 12 are only illustrative, and those skilled in the art can customize the signal source interfaces 12 as at least one of above signal source interfaces, based on the user groups for which the touch panel is sold.
  • the touch panel control circuit also includes a second switching switch 15, and the second switching switch 15 includes a second input terminal C2 and a plurality of third output terminals D3.
  • the second switching switch 15 is connected between the second transmission interface B2 of the touch diversion module 11 and the plurality of signal source interfaces 12.
  • the second input terminal C2 is connected with the second transmission interface B2, and a plurality of third output terminals D3 are connected with the plurality of signal source interfaces 12 in a one to one correspondence.
  • the changeover switch is a switch element that selects an output terminal responsive to the signal of the control terminal and connects the output terminal and the input terminal.
  • the second changeover switch 15 realizes the one-to-many connection between the touch diversion module 11 and the signal source interface 12.
  • the changeover switch configured to select the touch coordinate signal transmission is also the changeover switch configured to select the current display channel. Therefore, the control terminal of the second changeover switch 15 should receive the channel switching instruction.
  • the touch panel control circuit also includes a second MCU 14.
  • the second MCU 14 includes a first expansion terminal, a second expansion terminal and a third expansion terminal, and the second MCU 14 is connected between the first transmission interface B1 of the touch diversion module 11 and the touch information transmission interface E of the main chip 13.
  • the first expansion terminal is connected with the first transmission interface B1, and the second expansion terminal is connected with the touch information transmission interface E.
  • the second changeover switch 15 further includes a second control terminal G2.
  • the third expansion terminal is configured to output the channel switching instruction, and the third expansion terminal is connected with the second control terminal G2. Responsive to the channel switching instruction received by the second control terminal G2, the second changeover switch 15 is to determine which one of third output terminals D3 is connected with the second input terminal C2.
  • the second MCU 14 is used as a connecting part to realize the interface expansion of the interactive data between the main chip 13, the touch diversion module 11 and the second changeover switch 15, and meanwhile controls the third expansion terminal to output the channel switching instruction to control the second changeover switch 15 to realize the display channel switching, responsive to the instruction outputted from the main chip 13.
  • the second MCU 14 can also be connected with the channel switching button on the touch panel.
  • a program is written in the second MCU 14, and a channel switching instruction based on the voltage level signal triggered by the channel switching button is outputted. The program can be customized according to the functional requirements of the touch panel.
  • the first expansion terminal and the first transmission interface B1 is a UART(Universal Asynchronous Receiver/Transmitter) interface
  • the second expansion terminal and touch information transmission interface E are USB(Universe Serial Bus) interfaces
  • the second input terminal C2 and the second transmission interface B2 are USB interfaces.
  • FIG. 3 is a schemtatic view of the touch diversion module 11 according to an embodiment of the present application, which includes a first MCU 111, a first switch 112 and a hub 113.
  • the first switch 112 includes a first control terminal G1, a first input terminal C1, a first output terminal D1 and a second output terminal D2.
  • the hub 113 includes a first access terminal, a second access terminal, and an exit terminal.
  • the first MCU 111 includes an input device connecting terminal, a changeover switch connecting terminal, a main chip connecting terminal and a signal source connecting terminal.
  • the touch diversion module 11 is also configured to receive, via the first transmission interface B1, a branch switching instruction from the touch information transmission interface E of the main chip 13.
  • the main chip connecting terminal of the first MCU 111 is connected with the first transmission interface B1 (realizing the connection of the main chip 13).
  • the first MCU 111 is further configured to output a setting signal from the connecting terminal of the changeover switch responsive to the branch switching instruction, and the connecting terminal of the changeover switch is connected with the first control terminal G1 of the first changeover switch 112.
  • the first changeover switch 112 is configured to determine, responsive to the setting signal received by the first control terminal G1, that the first input terminal C1 is connected with which one of the first output terminal D1 and the second output terminal D2.
  • the first input terminal C1 is connected with input interface A of the touch diversion module 11.
  • the first output terminal D1 is connected with the first access end of the hub 113.
  • the second output terminal D2 is connected with the input device connecting terminal of the first MCU 111 (realizing the connection of the first MCU 111 with the touch input device), and the signal source connecting terminal of the first MCU 111 is connected with the second access end of the hub 113.
  • the exit terminal of the hub 113 is connected with the second transmission interface B2 of the touch diversion module 11.
  • one of the two branches can be selected for processing.
  • One branch is from the second output terminal D2 of the first changeover switch 112 to the input device connecting terminal of the first MCU 111.
  • the first touch coordinate signal is processed by the first MCU 111, and then the second touch coordinate signal is outputted through the main chip connecting terminal (connecting the first transmission interface B1) and / or the signal source connecting terminal (connecting the second transmission interface B2 through the hub 113) of the first MCU 111.
  • the processing of the first touch coordinate signal by the first MCU 111 can refer to the above embodiment, and this branch of signal processing can meet the functional requirements of the touch diversion module 11 in any embodiment of the disclosure.
  • the other branch is from first output terminal D1 of the first changeover switch 112, through the hub 113, and the signal is outputted via the second transmission interface B2. That is, without any processing, it is equivalent to that there is no touch diversion module 11. Therefore, the debugging or upgrading of the general touch input device can be completed, and when the diversified processing of the touch coordinate signal input by the touch input device is expanded, the device debugging or upgrading function of general touch input is also guaranteed.
  • touch panel control circuit of this embodiment can refer to the corresponding configurations in the above embodiments, and will not be repeated here.
  • a touch diversion module which receives the first touch coordinate signal from the touch input device and the signal distribution instruction from the main chip, is added to the touch panel control circuit.
  • the function of distributing touch coordinate signal to the external signal source and / or the main chip is further realized, based on the signal distribution instruction. That is, the touch diversion module not only realizes the expansion of the interface to complete the function of distributing touch coordinate signal to two channels, but also customizes an interface protocol on the touch diversion module to realize the distribution of touch coordinate signal based on the signal distribution instruction.
  • the present application addresses the problem of necessity for adding an output interface to the touch input device, customizing the interface protocol and increasing the development process of touch panel, so as to achieve the effect of enabling use of general touch input device, simplifying the development process of touch panel and reducing the cost.
  • Fig. 4 is a structural diagram of the touch panel in an embodiment.
  • the touch panel includes a touch input device 20, and a touch panel control circuit 10 provided by any embodiment of the disclosure.
  • the touch input device 20 includes an output interface which is connected with the input interface of the touch diversion module 11 in the touch panel control circuit 10.
  • the touch panel also includes a signal source 30, and the signal source interface of the touch diversion module 11 includes a PC module interface 121 and an Android module interface 122.
  • the signal source 30 includes a PC module 31 pluggably connected to the PC module interface 121 and an Android module 32 pluggably connected to the Android module interface 122.
  • the touch input device 20 is a capacitive screen touch box, an infrared touch box or an electromagnetic screen.
  • the touch panel provided by this embodiment includes the touch panel control circuit provided by example 1 or example 2, so it has corresponding beneficial effects.
  • first and second are used only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as “first” and “second” may explicitly or implicitly include at least one of the features.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Computer Hardware Design (AREA)
  • Position Input By Displaying (AREA)
  • User Interface Of Digital Computer (AREA)
EP18915586.4A 2018-04-16 2018-11-16 Steuerschaltung für berührungstafel und berührungstafel Active EP3767439B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810339498.2A CN108549500B (zh) 2018-04-16 2018-04-16 一种触控平板控制电路和触控平板
PCT/CN2018/115965 WO2019200906A1 (zh) 2018-04-16 2018-11-16 触控平板控制电路和触控平板

Publications (3)

Publication Number Publication Date
EP3767439A1 true EP3767439A1 (de) 2021-01-20
EP3767439A4 EP3767439A4 (de) 2021-06-09
EP3767439B1 EP3767439B1 (de) 2022-02-16

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US (1) US11226701B2 (de)
EP (1) EP3767439B1 (de)
CN (1) CN108549500B (de)
ES (1) ES2910119T3 (de)
WO (1) WO2019200906A1 (de)

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ES2910119T3 (es) 2022-05-11
EP3767439A4 (de) 2021-06-09
CN108549500B (zh) 2021-01-19
CN108549500A (zh) 2018-09-18
US20210019012A1 (en) 2021-01-21
WO2019200906A1 (zh) 2019-10-24
US11226701B2 (en) 2022-01-18

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